What was found
DURING FLIGHT, THE LEFT INTAKE ILLUMINATED AT 4 SECONDS AFTER ENGINE ANTI-ICE SWITCHED ON OR WHEN RESETTING LEFT INTAKE CIRCUIT BREAKER. AIRCRAFT RETURNED TO DTW. MAINTENANCE REPLACED LEFT THERMAL CONTROLLER, OPS CHECK GOOD.
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
DURING FLIGHT, THE LEFT INTAKE ILLUMINATED AT 4 SECONDS AFTER ENGINE ANTI-ICE SWITCHED ON OR WHEN RESETTING LEFT INTAKE CIRCUIT BREAKER. AIRCRAFT RETURNED TO DTW. MAINTENANCE REPLACED LEFT THERMAL CONTROLLER, OPS CHECK GOOD.